{
 "ocl_version": "0.1.0",
 "name": "Millard Road",
 "slug": "millard-road",
 "confidence": "U",
 "reported_claims": [],
 "ladder": [
  {
   "window_m": 2.0,
   "max_gradient_pct": 56.71415215332729,
   "diagnostic": true,
   "flags": [],
   "start_distance_m": 1286.0,
   "end_distance_m": 1288.0,
   "start_elevation_m": 347.1202720307925,
   "end_elevation_m": 348.254555073859,
   "min_gradient_pct": -48.86165240808964
  },
  {
   "window_m": 3.0,
   "max_gradient_pct": 55.310675945643574,
   "diagnostic": true,
   "flags": [],
   "start_distance_m": 1286.0,
   "end_distance_m": 1289.0,
   "start_elevation_m": 347.1202720307925,
   "end_elevation_m": 348.7795923091618,
   "min_gradient_pct": -41.00759102910274
  },
  {
   "window_m": 5.0,
   "max_gradient_pct": 51.15607095089558,
   "diagnostic": false,
   "flags": [],
   "start_distance_m": 1285.0,
   "end_distance_m": 1290.0,
   "start_elevation_m": 346.6836930952523,
   "end_elevation_m": 349.2414966427971,
   "min_gradient_pct": -30.675060414498603
  },
  {
   "window_m": 10.0,
   "max_gradient_pct": 38.27426271364004,
   "diagnostic": false,
   "flags": [],
   "start_distance_m": 1284.0,
   "end_distance_m": 1294.0,
   "start_elevation_m": 346.5205051125884,
   "end_elevation_m": 350.3479313839524,
   "min_gradient_pct": -12.598281164264904
  },
  {
   "window_m": 20.0,
   "max_gradient_pct": 23.75672723801756,
   "diagnostic": false,
   "flags": [],
   "start_distance_m": 1209.0,
   "end_distance_m": 1229.0,
   "start_elevation_m": 336.1439044220068,
   "end_elevation_m": 340.8952498696103,
   "min_gradient_pct": -8.64811387494143
  },
  {
   "window_m": 25.0,
   "max_gradient_pct": 21.994071028361077,
   "diagnostic": false,
   "flags": [],
   "start_distance_m": 1209.0,
   "end_distance_m": 1234.0,
   "start_elevation_m": 336.1439044220068,
   "end_elevation_m": 341.6424221790971,
   "min_gradient_pct": -8.279942488662527
  },
  {
   "window_m": 50.0,
   "max_gradient_pct": 20.81508403627265,
   "diagnostic": false,
   "flags": [],
   "start_distance_m": 1205.0,
   "end_distance_m": 1255.0,
   "start_elevation_m": 335.80621537598745,
   "end_elevation_m": 346.2137573941238,
   "min_gradient_pct": -7.551591557476286
  },
  {
   "window_m": 100.0,
   "max_gradient_pct": 15.487164642681535,
   "diagnostic": false,
   "flags": [],
   "start_distance_m": 1170.0,
   "end_distance_m": 1270.0,
   "start_elevation_m": 331.995760830539,
   "end_elevation_m": 347.4829254732205,
   "min_gradient_pct": -7.121946740951159
  }
 ],
 "shape": {
  "ascent_concentration": 0.47,
  "concentration_window_frac": 0.25,
  "longest_pitch_10pct_m": 68.0,
  "shape_class": "stepped"
 },
 "length_m": 1308.65081210247,
 "start_elevation_m": 293.69906319275975,
 "end_elevation_m": 351.22629968305216,
 "endpoint_gain_m": 57.52723649029241,
 "overall_gradient_pct": 4.395919519422414,
 "accumulated_ascent_m": 73.86437267628412,
 "window_maxima": {
  "max_5m": {
   "gradient_pct": 51.15607095089558,
   "start_distance_m": 1285.0,
   "end_distance_m": 1290.0,
   "midpoint_distance_m": 1287.5,
   "start_elevation_m": 346.6836930952523,
   "end_elevation_m": 349.2414966427971,
   "start_xy": [
    626594.7050705934,
    4672869.021701012
   ],
   "end_xy": [
    626594.2609254783,
    4672874.0019350955
   ]
  },
  "max_10m": {
   "gradient_pct": 38.27426271364004,
   "start_distance_m": 1284.0,
   "end_distance_m": 1294.0,
   "midpoint_distance_m": 1289.0,
   "start_elevation_m": 346.5205051125884,
   "end_elevation_m": 350.3479313839524,
   "start_xy": [
    626594.7939501776,
    4672868.025658688
   ],
   "end_xy": [
    626593.9059063866,
    4672877.986148753
   ]
  },
  "max_20m": {
   "gradient_pct": 23.75672723801756,
   "start_distance_m": 1209.0,
   "end_distance_m": 1229.0,
   "midpoint_distance_m": 1219.0,
   "start_elevation_m": 336.1439044220068,
   "end_elevation_m": 340.8952498696103,
   "start_xy": [
    626605.7963035522,
    4672794.2473702645
   ],
   "end_xy": [
    626599.6809014385,
    4672813.243204127
   ]
  },
  "max_25m": {
   "gradient_pct": 21.994071028361077,
   "start_distance_m": 1209.0,
   "end_distance_m": 1234.0,
   "midpoint_distance_m": 1221.5,
   "start_elevation_m": 336.1439044220068,
   "end_elevation_m": 341.6424221790971,
   "start_xy": [
    626605.7963035522,
    4672794.2473702645
   ],
   "end_xy": [
    626599.2369682007,
    4672818.22345699
   ]
  },
  "max_50m": {
   "gradient_pct": 20.81508403627265,
   "start_distance_m": 1205.0,
   "end_distance_m": 1255.0,
   "midpoint_distance_m": 1230.0,
   "start_elevation_m": 335.80621537598745,
   "end_elevation_m": 346.2137573941238,
   "start_xy": [
    626607.1070481465,
    4672790.46822409
   ],
   "end_xy": [
    626597.3709743423,
    4672839.140388259
   ]
  },
  "max_100m": {
   "gradient_pct": 15.487164642681535,
   "start_distance_m": 1170.0,
   "end_distance_m": 1270.0,
   "midpoint_distance_m": 1220.0,
   "start_elevation_m": 331.995760830539,
   "end_elevation_m": 347.4829254732205,
   "start_xy": [
    626619.9149147652,
    4672757.939370867
   ],
   "end_xy": [
    626596.0379165332,
    4672854.081035202
   ]
  }
 },
 "window_minima": {
  "min_5m": {
   "gradient_pct": -30.675060414498603,
   "start_distance_m": 1279.0,
   "end_distance_m": 1284.0,
   "midpoint_distance_m": 1281.5,
   "start_elevation_m": 348.05425813331334,
   "end_elevation_m": 346.5205051125884,
   "start_xy": [
    626595.2389641957,
    4672863.04550181
   ],
   "end_xy": [
    626594.7939501776,
    4672868.025658688
   ]
  },
  "min_10m": {
   "gradient_pct": -12.598281164264904,
   "start_distance_m": 1274.0,
   "end_distance_m": 1284.0,
   "midpoint_distance_m": 1279.0,
   "start_elevation_m": 347.7803332290149,
   "end_elevation_m": 346.5205051125884,
   "start_xy": [
    626595.6828974412,
    4672858.065248859
   ],
   "end_xy": [
    626594.7939501776,
    4672868.025658688
   ]
  },
  "min_20m": {
   "gradient_pct": -8.64811387494143,
   "start_distance_m": 194.0,
   "end_distance_m": 214.0,
   "midpoint_distance_m": 204.0,
   "start_elevation_m": 295.22214627610504,
   "end_elevation_m": 293.49252350111675,
   "start_xy": [
    627215.4374381881,
    4672104.930472472
   ],
   "end_xy": [
    627214.9965947368,
    4672124.925514619
   ]
  },
  "min_25m": {
   "gradient_pct": -8.279942488662527,
   "start_distance_m": 189.0,
   "end_distance_m": 214.0,
   "midpoint_distance_m": 201.5,
   "start_elevation_m": 295.5625091232824,
   "end_elevation_m": 293.49252350111675,
   "start_xy": [
    627215.5594489127,
    4672099.931961972
   ],
   "end_xy": [
    627214.9965947368,
    4672124.925514619
   ]
  },
  "min_50m": {
   "gradient_pct": -7.551591557476286,
   "start_distance_m": 163.0,
   "end_distance_m": 213.0,
   "midpoint_distance_m": 188.0,
   "start_elevation_m": 297.3393862852191,
   "end_elevation_m": 293.563590506481,
   "start_xy": [
    627215.3934642307,
    4672073.938106219
   ],
   "end_xy": [
    627215.0145918216,
    4672123.925676579
   ]
  },
  "min_100m": {
   "gradient_pct": -7.121946740951159,
   "start_distance_m": 127.0,
   "end_distance_m": 227.0,
   "midpoint_distance_m": 177.0,
   "start_elevation_m": 299.98759098295693,
   "end_elevation_m": 292.86564424200577,
   "start_xy": [
    627213.5905977587,
    4672037.987821442
   ],
   "end_xy": [
    627214.7615969802,
    4672137.923389988
   ]
  }
 },
 "diagnostic_window_maxima": {
  "max_2m": {
   "gradient_pct": 56.71415215332729,
   "start_distance_m": 1286.0,
   "end_distance_m": 1288.0,
   "midpoint_distance_m": 1287.0,
   "start_elevation_m": 347.1202720307925,
   "end_elevation_m": 348.254555073859,
   "start_xy": [
    626594.616936693,
    4672870.017809594
   ],
   "end_xy": [
    626594.4389310856,
    4672872.009872344
   ]
  },
  "max_3m": {
   "gradient_pct": 55.310675945643574,
   "start_distance_m": 1286.0,
   "end_distance_m": 1289.0,
   "midpoint_distance_m": 1287.5,
   "start_elevation_m": 347.1202720307925,
   "end_elevation_m": 348.7795923091618,
   "start_xy": [
    626594.616936693,
    4672870.017809594
   ],
   "end_xy": [
    626594.3499282821,
    4672873.00590372
   ]
  }
 },
 "diagnostic_note": "Windows <=3 m are at raster-noise scale (1-sigma raster noise alone is roughly +/-7 pp at 2 m and +/-5 pp at 3 m on a 1 m DTM). Diagnostic use only: never a headline or ranking value.",
 "quality_summary": {
  "review": [
   "max5_over_45",
   "short_window_divergence"
  ],
  "extent": [
   "may_continue_beyond_end"
  ]
 },
 "provenance": {
  "analysis_version": "0.1.0",
  "sample_interval_m": 1.0,
  "interpolation": "bilinear",
  "smoothing": "none",
  "gradient_windows_m": [
   5.0,
   10.0,
   20.0,
   25.0,
   50.0,
   100.0
  ],
  "diagnostic_windows_m": [
   2.0,
   3.0
  ],
  "elevation_crs": "EPSG:26918",
  "elevation_resolution_m": 1.0,
  "elevation_tiles": [
   "data/cache/usa/ma/USGS_1M_18_x62y468_MA_Western_B24.tif"
  ],
  "calculated_at": "2026-09-03T19:01:14+00:00",
  "road_source": "/mnt/HC_Volume_106727764/site-corpus-fresh/us/millard-road/millard-road.geojson",
  "run_id": "canopy-all-260903",
  "elevation_provider": "USGS 3DEP (The National Map)",
  "elevation_licence": "Public domain \u2014 USGS 3DEP 1 m DEM, courtesy of the U.S. Geological Survey",
  "elevation_dataset": "USGS 3DEP 1 m DEM, MA_Western_B24 (collected 2023-24)",
  "elevation_tile_ids": [
   "x62y468"
  ],
  "climb_origin": "discovered",
  "canopy_check": "unavailable \u2014 EPT corridor failed: NY_Columbia_Rensselaer_2016: EPT covers only 47% of stations; NY_HudsonRiverRegion_1_2020: no corridor points fetched; NY_Hudson_1_D22: no corridor points fetched",
  "license": "ODbL-1.0",
  "license_url": "https://howsteep.org/licensing.html"
 },
 "area": {
  "place": "Egremont",
  "county": "Massachusetts"
 }
}